gijs_pong/.planning/research/FEATURES.md

Feature Research

Domain: HTML5 Arcade Pong Game Researched: 2026-03-10 Confidence: HIGH

Feature Landscape

Table Stakes (Users Expect These)

Features users assume exist. Missing these = product feels incomplete.

Feature	Why Expected	Complexity	Notes
Basic Pong gameplay (ball + 2 paddles)	Core game loop—players can't engage without it	LOW	Ball physics, collision detection, paddle movement
Single-player vs AI	Standard for arcade games; gives solo players something to do	MEDIUM	AI needs configurable difficulty to feel fair
2-player local multiplayer	Arcade tradition; keyboard-first implementation, same machine	LOW	Straightforward split-input handling
Game screens (title, mode select, game over)	Professional game expectation; unpolished without them	MEDIUM	Navigation between screens, state management
Settings menu	Expected in any "finished" game; customization signals quality	MEDIUM	Difficulty level, color scheme, sound toggle
Score tracking & display	Players need feedback on performance; missing = feels broken	LOW	HUD element, persisted in-game via canvas
Pause functionality	User expectation for any interactive app	LOW	Toggle game loop, overlay pause screen
Win conditions (first to X points/match structure)	Without clear goals, game feels aimless	LOW	Score tracking, match rounds, restart logic
Responsive controls (smooth paddle movement)	Core feel—sluggish controls = game feels bad	MEDIUM	Keyboard input, velocity-based movement
Visual feedback on collision (ball impact visual)	Players expect immediate action-response connection	LOW	Flash, particle pop, or glow on hit

Differentiators (Competitive Advantage)

Features that set the product apart. Not required, but valuable.

Feature	Value Proposition	Complexity	Notes
Particle effects on ball impact	Creates "juice"—game feels modern and satisfying vs flat	MEDIUM	Burst of 5-10 particles, fade over ~0.2s
Glow/aura effects on paddles/ball	Neon/arcade aesthetic; makes visuals pop off screen	MEDIUM	Canvas shadow glow, can be toggled via settings
Screen shake on scoring/power-up	Physical feedback without controller; adds impact	LOW	Offset canvas camera 2-5px for 100-200ms
Ball trail/motion blur effect	Tracks ball movement, improves visual clarity at speed	MEDIUM	Canvas line drawing from previous positions
Power-ups during play (multi-ball, slow time, enlarged paddle)	Adds strategic depth, breaks up gameplay rhythm, keeps matches fresh	HIGH	Spawn logic, collision detection, timer management
Multiple arenas/stages (different visual themes or layouts)	Extends play value; visual freshness; progression feel	MEDIUM	Stage obstacles, different visual tiling/colors
Difficulty progression (ball speeds up as match progresses)	Makes game escalate tension; comebacks feel earned	LOW	Velocity scaling with score or time
Sound effects (paddle hit, wall hit, score, power-up)	Polished audio feedback; arcade authenticity	MEDIUM	Web Audio API or HTML5 audio elements, 4-6 SFX
Background music/ambience	Sets mood; modern games expected to have it	MEDIUM	Looping track, can be muted in settings
Combo/streak counter	Gamification hook; makes chaining successes feel rewarded	LOW	Visual counter, audio/visual feedback on streak
Visual variety (color schemes, neon vs retro vs modern)	Customization drives engagement; feels "yours"	LOW	Canvas color theming, easy CSS/JS swap

Anti-Features (Commonly Requested, Often Problematic)

Features that seem good but create problems.

Feature	Why Requested	Why Problematic	Alternative
Online multiplayer / leaderboards	"Let players compete globally" sounds appealing	Requires backend, authentication, persistence; exponentially increases complexity; out of scope for v1	Stick with local multiplayer; defer online until core game ships
Mobile touch controls	"More players via phones" seems like obvious feature expansion	Touch has different physics (no relative movement); screen size ruins UI; controls feel imprecise; derails keyboard focus	Mobile-first is a separate project; keyboard design is cleaner
Persistent progression / accounts	"Save player progress" feels professional	Requires database or localStorage manipulation; cheating risk; adds state management burden	No accounts for v1; each session is independent
Tutorial / onboarding flow	"Help new players understand mechanics" is thoughtful	Arcade games learn-by-doing; tutorial adds complexity; most Pong players understand immediately	Let players figure it out in 30 seconds; simple help text in menu
Ultra-complex power-up economy	"10+ power-up types for replayability" sounds great	Creates balancing nightmare; testing burden explodes; confuses simple game; dilutes impact of each power-up	Start with 3-4 power-ups; quality over quantity
Highly detailed obstacle-heavy arenas	"More level variety through complexity" feels deep	Clutters screen; makes collision detection harder; slows down pacing; feels chaotic vs satisfying	Simple arena variations (walls, center obstacle); minimize visual noise
Procedural/random stage generation	"Infinite replayability" sounds cool	Makes balance impossible; can generate unwinnable/boring states; unfair feel	Handcrafted stages; 3-5 solid arenas beats infinite bad ones
AI learning / adaptation	"AI that gets better as you play"	Feels unfair; players resent opponent learning from them; debugging nightmare	Simple difficulty levels; consistent, beatable AI at each level
Deep customization (paddle size, ball size, court dimensions)	"Let players tinker" signals flexibility	Breaks game balance; creates invalid states; players get lost in options; paralysis	Fixed geometry; color/visual customization only

Feature Dependencies

Title Screen
    └──requires──> Game Mode Select
                       ├──requires──> Solo Play (AI Opponent)
                       │                  └──requires──> Game Loop (core Pong)
                       │                                  ├──requires──> Ball Physics
                       │                                  ├──requires──> Collision Detection
                       │                                  └──requires──> AI Difficulty System
                       │
                       └──requires──> 2-Player Mode
                                          └──requires──> Game Loop (same as above)

Game Loop
    ├──requires──> Score Display
    ├──requires──> Pause Functionality
    │
    ├──enhances──> Visual Feedback (particles, glow, trails)
    ├──enhances──> Sound Effects
    │
    └──enables────> Power-ups
                       ├──requires──> Power-up Spawn System
                       └──requires──> Power-up UI (timer display)

Power-ups
    └──requires──> Game Loop (core physics must handle multi-ball, etc.)

Game Over Screen
    ├──requires──> Score Tracking
    └──requires──> Restart / Menu Navigation

Settings Menu
    ├──enhances──> AI Difficulty (toggle Easy/Medium/Hard)
    ├──enhances──> Visual Effects (toggle particles, glow, trails)
    ├──enhances──> Audio (toggle sound effects, music)
    └──enhances──> Visual Theme (color scheme selection)

Multiple Arenas
    └──requires──> Arena Selection / Mode Select Screen
                       └──enhances──> Replayability

Dependency Notes

• Game Loop requires Ball Physics and Collision Detection: Pong is unplayable without these core mechanics.
• AI Opponent requires Difficulty System: Difficulty toggle is critical for fair single-player experience; easy AI vs hard AI makes massive difference in satisfaction.
• Visual Feedback enhances Game Loop: Particles, glow, trails don't break core game but make it feel modern. These are the "juice" that separates polished from flat.
• Power-ups enable Strategic Play: Power-ups require solid core loop first; launching with broken power-up balance is worse than launching without them.
• Settings Menu enhances Multiple Features: Settings unlock customization across difficulty, visuals, and audio without complicating core gameplay.
• Multiple Arenas depend on Core Loop: New arenas need stable physics first; can add in v1.x after core validates.

MVP Definition

Launch With (v1)

Minimum viable product — what's needed to validate the concept.

• Basic Pong gameplay (ball, 2 paddles, collision detection) — Players need the core game
• AI opponent with difficulty levels (Easy/Medium/Hard) — Solo players need something to do
• 2-player local multiplayer — Keyboard multiplayer is arcade tradition
• Score display & match structure (first to N points) — Players need goals
• Title screen, mode select, game over screens — Polished feel matters
• Pause functionality — Users expect to pause
• Basic visual feedback (collision flash or glow) — "Juice" starts here
• Basic sound effects (paddle hit, wall hit, score sound) — Arcade authenticity
• Settings menu (difficulty, sound toggle, color scheme) — Control signals quality

Add After Validation (v1.x)

Features to add once core is working and players engage.

• Particle effects on impact — Players will notice lack of visual polish; easy win for engagement
• Ball trails / motion blur — Improves clarity at high speeds; visual feedback upgrade
• Power-ups (3-4 types: multi-ball, slow time, enlarged paddle, speed boost) — Adds strategic depth after core gameplay proves solid
• 2nd & 3rd arena variations (theme/obstacle changes) — Extends play value once players want variety
• Background music loop — Ambience upgrade; audio polish
• Screen shake on scoring — Impact feedback; easy add-on

Future Consideration (v2+)

Features to defer until product-market fit is established.

• Advanced power-ups (ice ball, split shot, shield) — Risk of over-complicating game feel
• Combo/streak counter system — Gamification; depends on user feedback about engagement
• Online leaderboards — Requires backend; out of scope for static HTML5 delivery
• AI learning / adaptation — Risk of feeling unfair; complexity not justified
• Mobile touch controls — Separate design problem; keyboard focus is cleaner
• Procedural stage generation — Risk of balance problems; handcrafted is better

Feature Prioritization Matrix

Feature	User Value	Implementation Cost	Priority
Core Pong gameplay	HIGH	MEDIUM	P1
AI opponent with difficulty	HIGH	MEDIUM	P1
2-player local multiplayer	HIGH	LOW	P1
Game screens (title, menu, over)	HIGH	MEDIUM	P1
Score tracking & display	HIGH	LOW	P1
Pause functionality	MEDIUM	LOW	P1
Settings menu	MEDIUM	MEDIUM	P1
Basic visual feedback (glow/flash)	HIGH	LOW	P1
Basic sound effects	MEDIUM	LOW	P1
Particle effects on impact	HIGH	MEDIUM	P2
Ball trail / motion blur	MEDIUM	MEDIUM	P2
Power-ups (multi-ball, etc.)	HIGH	HIGH	P2
Multiple arenas	MEDIUM	MEDIUM	P2
Background music	MEDIUM	MEDIUM	P2
Screen shake on scoring	MEDIUM	LOW	P2
Combo counter	LOW	LOW	P3
Advanced power-up types	MEDIUM	HIGH	P3
Online multiplayer	LOW	CRITICAL	P3+
Mobile touch controls	LOW	HIGH	P3+

Priority key:

• P1: Must have for launch (v1) — Ship with these
• P2: Should have, add when possible (v1.x) — Polish pass
• P3: Nice to have, future consideration (v2+) — Defer or skip

Arcade Game Design Expectations

Based on industry patterns for arcade-style games, here's what makes a Pong game feel "complete":

Screen & Menu Flow

• Title Screen: Logo/game name, prominent start button, settings access
• Mode Select: Clear choices (Solo vs 2-Player), easy navigation
• Game Screen: Clean HUD (scores, timer if applicable), minimal UI noise
• Pause Screen: Large "PAUSED" text, resume/settings/menu options, darkened overlay
• Game Over Screen: Final scores, winner announcement, restart/menu navigation

Game Feel Expectations

• Controls respond instantly (no input lag)
• Collision feedback is immediate (flash, sound, particle burst)
• Score changes are celebrated (sound + visual feedback)
• Difficulty scaling feels fair (AI doesn't feel cheesy at any level)
• Game is immediately playable (no tutorial; learn by doing)

Visual Polish Indicators

• Modern Pong games use neon/glow aesthetic OR clean minimal design (rarely both)
• Movement has trails or blur at high speeds
• Impacts register visually, not just mechanically
• Color scheme is consistent (coherent visual language)

Audio Expectations

• Paddle hits have distinct sound from wall hits (Pong classic: octave difference)
• Point scoring gets celebration audio (different from hit sounds)
• No audio ever blocks game state changes (no long audio sequences)
• Music/ambient is subtle; doesn't mask game sounds

Competitor Feature Analysis

Feature	Pong Quest (RPG take)	Pixel Pong Pro (arcade)	Pong Worlds (modern)	Super Pong Next Gen (our approach)
Core Pong gameplay	Yes, wrapped in RPG progression	Yes, arcade-focused	Yes, with obstacles	Yes, with juice
AI difficulty levels	Multiple via level progression	Adjustable difficulty	Yes	Easy/Medium/Hard toggle
2-player mode	Dungeon co-op	Local vs mode	Yes	Keyboard local only
Power-ups	50+ silly power-ups	Time-slow mechanic	5 paddle variants	3-4 focused power-up types
Visual polish	Retro pixel style	Glitchy effects	Neon/modern	Glow, particles, trails
Sound design	Audio feedback	Arcade beeps	Music + SFX	Classic Pong tones + modern polish
Multiple stages	Themed dungeons	Endless arcade	5+ worlds	3-4 arena variations
Persistence	RPG progression tree	Score records	Progression unlocks	Session-based, no persistence
Scope	Medium (RPG wrapper)	Small (arcade focus)	Medium (cosmetics)	Small-Medium (pure arcade juice)

Our approach: Skip RPG bloat, skip endless mode chaos, skip complex cosmetic systems. Instead: solid core Pong + focused polish (particles, glow, trails) + 3-4 well-designed power-ups + 3-4 arena variations. Quality over quantity.

Sources

• Basic Pong HTML and JavaScript Game
• Top HTML5 games tagged pong - itch.io
• How to Create a Ping Pong Game with HTML, CSS and JavaScript
• Arcade Game Design Fundamentals
• How Arcade Game Design Still Shapes Interactive Entertainment
• Squeezing more juice out of your game design
• Juice in Game Design: Making Your Games Feel Amazing
• Pong AI and Game Mechanics
• Pong Game Using AI
• Game UI Database - Title Screen
• Game UI Database - Pause Screen
• Breaking Down Breakout: System And Level Design
• The Impact Of Sound And Music In Arcade Gaming
• 7 HTML5 Game Design Mistakes to Avoid
• The Ultimate Guide to Game Design Anti-patterns
• Principles Of HTML5 Game Design

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Feature research for: HTML5 Arcade Pong Game Researched: 2026-03-10